Got a lead on an early DuMont TV locally

[vortalexfan]

Well I got the two chassis out of the cabinet and the TV brought inside, with some help, this TV had an interesting modification in it, somone at some point in time had added a 5v filiment transformer to the side of the inside of the cabinet for some reason and the filiment transformer was wired in with the main power transformer which is a beast of a power transformer, its at least 6" tall and probably a good solid 20# of iron.

The TV does use 2 5U4G rectifier tubes so I wonder if the TV might have gotten hit by lightning at some point in its life which may have fried one of the 5v filiment windings in the original transformer so they had to install a new 5v filiment transformer to replce the dead 5v filiment winding in the power transformer?

Also another weird thing is that the picture tube had a dual stage picture tube booster (brightener) attached to the picture tube and I'm wondering if the picture tube was really in that bad of condition to warrant the use of a picture tube brightener; or if it was meant to be used as a way to boost the voltage for the picture tube because perhaps that 5v filiment transformer was actually being used to replace a bad 6.3V winding on the transformer and it needed an extra voltage boost to get the picture tube filiment voltage to where it needed to be voltage wise?

Just spitballing some ideas here, not claiming to know what's going on here, but would definitely like to hear what you guys think could have happened to the TV in its past to warrant these odd modifications (which I'll admit the picture tube brightener in of itself is not an odd modification, but that along with a replacement filiment transformer, is an odd modification.)